isomorphism-class-0.2.0.1: CHANGELOG.md

# 0.2

- `IsomorphicTo` renamed to `Is`
- `IsSome` is introduced as a parent class to it
- `to` moved to `IsSome`
- `showAs` dropped
- `String` isomorphism instances for textual types dropped, since they were not exactly isomorphisms
- `IsSome` instances added for `String` for textual types